What powers upsell.is?
Last seen Jun 2026 · 15 technologies across 11 categories
Analytics
Google Analytics
since Mar 2024
Vercel Analytics
since Mar 2024
CDN
Cloudflare
since Jan 2024
CMS
Prismic
since Jan 2024
JavaScript frameworks
Miscellaneous
Open Graph
since Jan 2024
Webpack
since Jan 2024
PaaS
Vercel
since Jan 2024
Performance
Priority Hints
since Apr 2026
Programming languages
Node.js
since Jan 2024
Security
HSTS
since Jan 2024
UI frameworks
Tailwind CSS
since Jan 2024
Webmail
Google Workspace
since Jan 2024
Audience
- 100% desktop
Iceland
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.53 / 10 · ranked #6,218,297 of all domains
4 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| INP | 225 ms |
| CLS | 0 |
| TTFB | 100 ms |
Real user p75, Chrome UX Report, Jun 2026.